<template>
  <div class="home-container">
    <van-nav-bar class="page-nav-bar" fixed>
      <van-button
        class="search-btn"
        slot="title"
        type="info"
        size="small"
        round
        @click="$router.push('/search')"
        icon="search"
      >搜索</van-button>
    </van-nav-bar>

    <van-tabs 
      class="channel-tabs"
      v-model="active"
      animated 
      swipeable>
      <van-tab 
        v-for="channel in channels"
        :key="channel.id"
        :title="channel.name"
      >
        <article-list :channel="channel"></article-list>
      </van-tab>
      <div slot="nav-right" class="placeholder"></div>
      <div slot="nav-right" class="hamburger-btn" @click="isChannelEditShow = true">
        <i class="toutiao toutiao-gengduo"></i>
      </div>
    </van-tabs>

    <van-popup
      v-model="isChannelEditShow"
      position="bottom"
      closeable
      class="edit-channel-popup"
      close-icon-position="top-left"
      :style="{ height: '100%' }">
      <channel-edit 
        @updateActive="updateActiveFn"
        :channels="channels"
        :active="active"/>
    </van-popup>
  </div>
</template>

<script>
import {getUserChannels} from '@/api/user'
import ArticleList from './components/article-list.vue'
import ChannelEdit from './components/channel-edit.vue'
import {mapState} from 'vuex'
import {getItem} from '@/utils/storage'

export default {
  name: 'home',
  data() {
    return {
      active: 0,
      channels: [],
      isChannelEditShow: false
    }
  },
  components: {
    ArticleList: ArticleList,
    ChannelEdit
  },
  computed: {
    ...mapState(['user'])
  },
  created() {
    this.getUserChannelsFn()
  },
  methods: {
    async getUserChannelsFn() {
      try {
        if( this.user ) {
          const {data} = await getUserChannels()

          this.channels = data.data.channels
        } else {
          const local = getItem('TOUTIAO_CHANNEL')
          
          if(local) {
            this.channels = local
          } else {
            const {data} = await getUserChannels()

            this.channels = data.data.channels
          }
        }
    
      } catch(err) {
        this.$toast('请求失败')
      }
    },
    updateActiveFn(index, flag) {
      console.log(index)
      this.active = index
      this.isChannelEditShow = flag
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  padding-bottom: 100px;
  padding-top: 180px;
  .edit-channel-popup {
    padding-top: 100px;
    box-sizing: border-box;
  }
  /deep/ .van-tabs__wrap {
    position: fixed;
    top: 92px;
    z-index: 2;
    width: 100%;
    border-bottom: 1px solid #EDEFF3;
  }
  /deep/ .van-nav-bar__title {
    max-width: unset;
  }
  .search-btn {
    width: 555px;
    height: 64px;
    background-color: #5babfb;
    border: none;
    font-size: 28px;
    .van-icon {
      font-size: 32px;
      color: #fff;
    }
  }
  /deep/ .channel-tabs {
    .van-tab {
      border-right: 1px solid #EDEFF3;
      min-width: 200px;
      height: 80px;
      .van-tab__text {
        font-size: 27px;
        color: #777777;
      }
    }

    .van-tab--active .van-tab__text{
      color: #333 !important;
    }
    .van-tabs__line {
      width:31px !important;
      height:6px;
      background:rgba(50,150,250,1);
      border-radius:3px;
      bottom: 8px;
    }
    .van-tabs__nav {
      padding: 0;
    }
  }

  .placeholder {
    flex-shrink: 0;
    width: 66px;
    height: 82px;
  }
  .hamburger-btn {
    position: fixed;
    right: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 66px;
    height: 82px;
    background-color: #fff;
    opacity: 0.902;
    i.toutiao {
      font-size: 33px;
    }
    &:before {
      content: "";
      position: absolute;
      left: 0;
      width: 1px;
      height: 100%;
      background-image: url("~@/assets/gradient-gray-line.png");
      background-size: contain;
    }
  }
}
</style>
